Vasculitis Clinical Trials

• 18 years old≤Age≤75 years old, male or female;

• Diagnosis of granulomatosis with polyangiitis(GPA) or microscopic polyangiitis(MPA)；

• Newly diagnosed or relapsed GPA or MPA that requires treatment with a full starting dose of prednisone plus cyclophosphamide/azathioprine or rituximab；

• Positive test for anti-proteinase 3(PR3) or anti-myeloperoxidase (MPO)；

• Estimated glomerular filtration rate ≥15 mL/minute/1.73 m\^2；

• At least 1 major item, or at least 3 non-major items, or at least the 2 renal items on BVAS；